2010 - SAASTA
... density is greater than that of graphite and thus the carbon atoms rearrange into the more dense diamond packing under conditions of high pressure. Unlike diamond, graphite is an electrical conductor, and can be used, for instance, as the material in the electrodes of an electrical arc lamp. Graphit ...
... density is greater than that of graphite and thus the carbon atoms rearrange into the more dense diamond packing under conditions of high pressure. Unlike diamond, graphite is an electrical conductor, and can be used, for instance, as the material in the electrodes of an electrical arc lamp. Graphit ...
Chapter1 - WilsonChemWiki
... 1) The amount of reactant: as the amount of reactant increases the rate increases. 2) Temperature: as temperature increases, the rate increases. 3) Catalyst: is a substance that will increase the rate with out being part of the reaction. Chemical Equilibrium: The reaction reaches equilibrium when it ...
... 1) The amount of reactant: as the amount of reactant increases the rate increases. 2) Temperature: as temperature increases, the rate increases. 3) Catalyst: is a substance that will increase the rate with out being part of the reaction. Chemical Equilibrium: The reaction reaches equilibrium when it ...
Exam 2, Fall 2001
... 4. (8 points) You react zinc chloride with ammonia and isolate a solid with the formula Zn(NH3)xCl2 . To find out the value of x, first dissolve the sample in water. This releases the ammonia into the solution where it can be titrated with HCl. Zn(NH3)xCl2(s) → ZnCl2(aq) + x NH3(aq) In this experime ...
... 4. (8 points) You react zinc chloride with ammonia and isolate a solid with the formula Zn(NH3)xCl2 . To find out the value of x, first dissolve the sample in water. This releases the ammonia into the solution where it can be titrated with HCl. Zn(NH3)xCl2(s) → ZnCl2(aq) + x NH3(aq) In this experime ...
HIBBING COMMUNITY COLLEGE
... 48. describe endothermic and exothermic processes. 49. describe what happens when heat is added to a substance. 50. calculate the heat needed for phase changes and temperature changes. 51. perform calculations in calorimetry. 52. differentiate between low and high explosives. 53. determine an explos ...
... 48. describe endothermic and exothermic processes. 49. describe what happens when heat is added to a substance. 50. calculate the heat needed for phase changes and temperature changes. 51. perform calculations in calorimetry. 52. differentiate between low and high explosives. 53. determine an explos ...
Lehninger Principles of Biochemistry
... At the beginning of the titration, before any NaOH is added, the acetic acid is already slightly ionized, to an extent that can be calculated from its dissociation constant (Eqn 2–8). As NaOH is gradually introduced, the added OH combines with the free H in the solution to form H2O, to an extent t ...
... At the beginning of the titration, before any NaOH is added, the acetic acid is already slightly ionized, to an extent that can be calculated from its dissociation constant (Eqn 2–8). As NaOH is gradually introduced, the added OH combines with the free H in the solution to form H2O, to an extent t ...
Review Worksheet
... a) An electron falls from energy level 3 to energy level 2. What color of visible light is emitted? b) An electron falls from energy level 6 to energy level 3. What is the wavelength of the light emitted? 32. As an electron falls from a higher energy level to a lower one, energy is (absorbed, releas ...
... a) An electron falls from energy level 3 to energy level 2. What color of visible light is emitted? b) An electron falls from energy level 6 to energy level 3. What is the wavelength of the light emitted? 32. As an electron falls from a higher energy level to a lower one, energy is (absorbed, releas ...
Physical chemistry - MCQ topic quiz
... This formative assessment resource has been produced as part of our free Chemistry teaching and learning support package. All the Chemistry teaching and learning resources, including delivery guides, topic exploration packs, lesson elements and more are available on the qualification webpages. If y ...
... This formative assessment resource has been produced as part of our free Chemistry teaching and learning support package. All the Chemistry teaching and learning resources, including delivery guides, topic exploration packs, lesson elements and more are available on the qualification webpages. If y ...
Chemical equilibrium
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time. Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s). Such a state is known as dynamic equilibrium.